Accessory device for a field transmitter

Abstract

An accessory device for a field transmitter comprising an enclosure housing an electronic processing unit. Said device comprises a portable supporting body removably couplable with the transmitter and on which there are provided at least one activation unit which can be operated by a user, and an electronic processing circuit which is operatively interlocked with said activation unit and is suitable to be operatively connected to the electronics of the transmitter so as to transmit one or more signals thereto following actuation of the activation unit.

1. An accessory device for a field transmitter comprising:
 an enclosure housing an electronic unit, wherein said accessory device comprises a portable supporting body removably couplable with the transmitter and on which there are provided at least an activation unit which can be operated by a user; and 
 an electronic processing circuit which is operatively interlocked with said activation unit and is suitable to be operatively connected to the electronic unit of the transmitter so as to transmit one or more signals thereto following actuation of the activation unit. 
 
     
     
       2. An accessory device as claimed in  claim 1 , wherein said activation unit comprises a push button device. 
     
     
       3. An accessory device as claimed in  claim 2 , wherein said activation unit is of magnetic type. 
     
     
       4. An accessory device as claimed in  claim 1 , wherein said activation unit is of magnetic type. 
     
     
       5. An accessory device as claimed in  claim 4 , wherein said activation unit comprises magnetic actuation means and at least one first element for sensing magnetic fields which is activated by said magnetic actuation means and is operatively connected to said electronic processing circuit. 
     
     
       6. An accessory device as claimed in  claim 5 , wherein said portable supporting body comprises a first component which is suitable to be removably connected to the transmitter and to which said at least one first element for sensing magnetic fields is operatively associated, and a second component which is connected to the first component movably thereto and to which said magnetic actuation means are operatively associated. 
     
     
       7. An accessory device as claimed in  claim 6 , wherein said second component is movably coupled to the first component so that said magnetic actuation means are positionable alternatively in an activating position or in a non-activating position of said at least one element for sensing magnetic fields. 
     
     
       8. An accessory device as claimed in  claim 7 , wherein said magnetic actuation means comprise an activation magnet and a protective shield housed in two corresponding seats of said second component. 
     
     
       9. An accessory device as claimed in  claim 6 , wherein it comprises at least one non-volatile memory unit. 
     
     
       10. An accessory device as claimed in  claim 6 , wherein said magnetic actuation means comprise an activation magnet and a protective shield housed in two corresponding seats of said second component. 
     
     
       11. An accessory device as claimed in  claim 10 , wherein said magnetic actuation means comprise an activation magnet and a protective shield housed in two corresponding seats of said second component. 
     
     
       12. An accessory device as claimed in  claim 6 , wherein said at least one first element for sensing magnetic fields comprises a first magnetic switch positioned on a supporting board on which an electronic processing circuit operatively connected thereto is also placed, said supporting board being housed in a hollow portion defined in said first component. 
     
     
       13. An accessory device as claimed in  claim 12 , wherein it comprises a pair of conductor wires connected to the electronic processing circuit and suitable to be connected to a terminal block of the transmitter, said one or more signals being transmitted towards the electronic unit of the transmitter and electrical power flowing from a power supply line towards said electronic processing circuit along said wires. 
     
     
       14. An accessory device as claimed in  claim 5 , wherein it comprises a pair of conductor wires connected to the electronic processing circuit and suitable to be connected to a terminal block of the transmitter, said one or more signals being transmitted towards the electronic unit of the transmitter and electrical power flowing from a power supply line towards said electronic processing circuit along said wires. 
     
     
       15. An accessory device as claimed in  claim 14 , wherein said electronic processing circuit comprises a microprocessor connected to said first element for sensing magnetic fields and which receives therefrom at least one signal corresponding to actuation of the activation unit; a signal filter circuit which filters the reprocessed signal output from the microprocessor; and a circuit for adjusting the power supply voltage which is operatively connected to the terminal block of the transmitter through said pair of wires along which said one or more signals are transmitted. 
     
     
       16. An accessory device as claimed in  claim 14 , wherein said electronic processing circuit is configured so as to transmit said one or more signals as an FSK modem according to the standard Bell 202. 
     
     
       17. An accessory device as claimed in  claim 4 , wherein said portable supporting body comprises a first component which is suitable to be removably connected to the transmitter and to which said at least one first element for sensing magnetic fields is operatively associated, and a second component which is connected to the first component movably thereto and to which said magnetic actuation means are operatively associated. 
     
     
       18. An accessory device as claimed in  claim 1 , wherein said electronic processing circuit is configured so as to transmit said one or more signals as an FSK modem according to the standard Bell 202. 
     
     
       19. An accessory device as claimed in  claim 1 , wherein it comprises a serial port operatively connected to said electronic processing circuit. 
     
     
       20. A field transmitter wherein it comprises an accessory device as claimed in  claim 1 .